The company will oversee the project management of the power station on the Isle of Anglesey and will have nearly 200 employees working on the project.
Bechtel has operated in UK construction for more than 60 years, designing and building power stations, refineries, rail systems and communication networks. It has been involved in more than 150 nuclear plants, acting as architect engineer for 71 plants and constructing 42 of them.
Horizon has also signed further contracts with Hitachi Nuclear Energy Europe and JGC New Energy UK Limited to continue to provide support during the development stage.
Duncan Hawthorne, CEO of Horizon said: “These world-leading companies bring a wealth of nuclear, engineering and construction expertise to complement our growing organisation and will help us replicate the cost and schedule successes of the previous four ABWR reactors.
“The UK still needs reliable nuclear power to help transform our energy mix and we are gearing up to deliver that. Our first power station will be cheaper than what has gone before and after that, with smart financing, supply chain learnings and no need for first time overheads, future project costs will fall further still.”